Those dried beans in your pantry started out as shell beans. But during their brief season, you can buy those same beans fresh in their pods. The fresh beans have an incomparably creamy texture, don’t need to be soaked before cooking, and cook more quickly. One of the most widely available shell beans are cranberry beans, identifiable by their pink-and-cream mottled pods. Edamame and lima beans are other varieties that you may be most familiar with in their frozen forms, but are worth seeking out fresh. Also keep your eyes open for heirloom varieties of shell beans, including scarlet runner, Jacob’s Cattle, Ojo de Cabra (Goat's Eye), and Black Calypso.
Edamame (eh-dah-MAH-meh) are young, tender soybean pods. They are available frozen in Asian and gourmet grocery stores. To eat edamame, strip peas from each pod with your teeth, and discard the empty pods.
The fish and shitake mushrooms are steamed in the bottom basket, where the haet is stronger. Edamame (green soy beans), which just need to be heated through, can go in the top tier. This recipe can be doubled easily. Use a larger steamer, about ten inches in diameter, to cook all four portions at once in the same basket.